Nokia 2650 - Page 182

Issue 2 06/2005 COMPANY CONFIDENTIAL 25
Copyright © 2005 Nokia. All Rights Reserved.
RH-53/54
Nokia Customer Care
Figure 16:Frequency plan
64/
65
NDIV
ADIV
ϕ
Charge
Pump
RDIV
1/2
1/4
CPOUT
1/2
1/4
PLL
loop
filter
26MH
z
RBEXT
VXO
RF_EN
RF_CLK
RF_DATA
RESET_X_M
1/2
Buffer
VBEXT
LOCNT
REFCNT
Lock
Detect
2
XTALM
XTALP
REFOUT
REFOUT
VPLL
VDDCP
VDDPRE
VDDLO
VDDPLL
VDDXO
VREF
1
VDDDL
VDDDIG
VDDBBB
VBB (1.8V)
Digital
Control
2,7k
Vcp
supply
filter
SENSE
RESETX
INPLO
INMLO
VVCO
PA vendor
indication
Rpa
Ref.
filte
r
3
RFBUSX
RFBUSDA
RFBUSCLK
Synth
supply
filter
Ref clk set
VCXO
supply
filter
VR5
VR3
VR7
RFCONV_0(9)
VIO
VCOSENSE
VR2
Main Bias
Circuit
Resistor Ext/R2H/R2
VDDRXBB
Sensor
BIST / Temp.
VDDTX
33k : Hitachi
82k : RFMD
I/O
level
shift
Buf/
AGC
VCXO Bias
R2H/R2
VIO
SELADDR
AFC/CAL
Control
RESETX
3
GENIO6
VDDRXBB
222
2
2 22
To PCN
Modulator
To GSM
Modulator
To PCN RX
mixer
To GSM RX
mixer
Mjoelner
N600
ASIC